WNMG080408-MK5 WKK20S WKK20S Wendeplatten - Walter Tools

Benefit from the combination of abrasion-resistant grade and proven coating for longer tool life; the trigon 80° geometry with a 0.8 mm corner radius provides secure seating and reliable chip control. Order this insert via Metav Werkzeuge or consult our specialists for tailored recommendations.

WNMG080408-MK5 WKK20S turning indexable insert — Tiger‑tec Silver, for cast iron (Walter Tools)

The WNMG080408-MK5 WKK20S is a trigon 80° turning indexable insert designed for productive machining of cast iron components with a Tiger‑tec Silver coating and MK5 chipbreaker.

• Tiger·tec Silver coating for extended tool life
• WKK20S grade optimised for cast iron machining
• Trigon 80° form for positive seating and strength
• 0.8 mm corner radius with MK5 chipbreaker

Consistent chip control and abrasion resistance for cast iron

The combination of the Tiger‑tec Silver coating with the WKK20S grade is aimed specifically at the demands of cast iron machining: high abrasive wear and frequent, short, breaking chips. The integrated MK5 chipbreaker supports controlled chip formation, which reduces the risk of entanglement and minimises downtime for chip management. This results in more predictable tool life and fewer interruptions during roughing and semi‑finishing operations, delivering measurable gains in machining throughput without sacrificing surface integrity.

Robust geometry that ensures secure clamping and repeatable results

A trigon 80° form provides a compact seating area that combines strength with reliable indexability. The negative relief at 0° rake increases cutting edge security under heavy interrupted cuts, while the 0.8 mm corner radius balances edge strength with the ability to produce stable surface finishes. Together, these geometric choices reduce vibration sensitivity and support consistent part tolerances across multiple tool changes, enhancing reproducibility on serial production runs.

Productivity and process stability for demanding production environments

The coated, wear‑resistant grade and the insert geometry together increase overall productivity by enabling higher metal removal rates while maintaining acceptable flank and crater wear. The design supports process stability — fewer edge failures and longer intervals between index changes mean less machine idle time and lower tooling handling. For production shops handling cast iron components, this insert helps sustain cycle times and contributes directly to predictable output and lower unit manufacturing costs.

Application guidance and suitability

This insert is optimised for ISO group K materials, specifically a range of cast iron grades that produce short, abrasive chips. Typical uses include roughing and semi‑finishing of cast housings, brake components, and pump bodies where controlled chip flow and edge protection are priorities. For customers uncertain about the best insert choice for a particular casting grade or machining strategy, technical consultation is available to align cutting data with the workpiece material and machining centre capabilities.

Contact Metav Werkzeuge for tailored selection of Walter Tools Tiger‑tec Silver inserts and advice on cutting data; reach us at info@metav-werkzeuge.com or by phone on +49 2822 7131930

Technical Data

• Article number: WNMG080408-MK5-WKK20S-WALTER
• Name: Turning indexable insert WNMG080408-MK5 WKK20S
• Manufacturer: Walter Tools
• Series: Tiger‑tec Silver

Facts

• Size: 08
• Plate thickness: 04
• Corner radius: 0.8 mm
• Relief angle: 0° (negative)
• Tolerance class: M

Special features

• Grade: WKK20S (coated cemented carbide)
• Chipbreaker: MK5
• Shape: Trigon 80°
• Material suitability: cast iron (ISO K)
• Execution: G

FAQ

What materials is this insert intended for?
The WNMG080408-MK5 WKK20S insert is intended primarily for cast iron (ISO group K) applications and is optimised for the abrasive, short‑chip behaviour typical of these materials.

What does the MK5 chipbreaker provide?
The MK5 chipbreaker promotes controlled, short chips during cutting; combined with the Tiger‑tec Silver coating on the WKK20S grade, it helps maintain consistent chip flow and reduces the likelihood of chip jams.

How does the trigon 80° form affect performance?
The trigon 80° geometry offers a compact, strong seating face that improves clamping stability and repeatability under heavy or interrupted cuts, contributing to reliable tool life and consistent part quality.

Is the insert coated and how does that help?
Yes, the insert uses Tiger‑tec Silver coating technology; on the WKK20S grade this coating increases resistance to abrasive wear and supports longer intervals between index changes in cast iron machining.

Manufacturer/Responsible: Walter Deutschland GmbH, Derendinger Straße 53, 72072 Tübingen

Walter Tools (Walter AG) is a leading manufacturer of precision cutting tools and is known for its comprehensive range of solutions for productive metalworking. Protected trademarks and trade names are the property of their respective owners. Brand names and protected product names are mentioned solely for explanatory purposes. There is no affiliation between Metav Werkzeuge and the mentioned brands. The offered article is an original, factory‑new product of the manufacturer.